Refrigerator

Abstract

The utility model discloses a refrigerator, which is characterized in that a voltage detection module is arranged to detect the input voltage of the refrigerator, so that a controller can determine the temperature configuration and display mode of the refrigerator according to a level signal output by the voltage detection module. According to the technical scheme, the problem that components are prone to being mistakenly installed when the refrigerator is assembled on a production line is avoided, in addition, through the automatic identification technology, the temperature configuration and display requirements of different areas can be identified according to different voltages, then the corresponding temperature is displayed, and the temperature configuration and display mode correspond to the area where the refrigerator is located.

Description

Technical Field

[0001] The utility model relates to the field of refrigerators, in particular to a refrigerator. Background Art

[0002] With the development of technology and the improvement of living standards, the functions and styles of household appliances are becoming more and more diverse. However, the demand for refrigerator products in different regions is different, which will lead to non-universal design and inconvenient management. For example, refrigerator models exported to a certain region require conversion to Fahrenheit display, while models in another region use Celsius display; and models in a certain region have a lower refrigeration temperature setting range, while models in another region have a higher refrigeration temperature setting range (1 to 2°C higher). At present, there is no automatic recognition technology for refrigerators to meet the needs of such different temperature displays and configuration methods. Instead, different components are used for assembly when configuring the model on the production line. That is, the components are not universal, which makes it easy to install the wrong components when assembling the refrigerator on the production line, making the temperature configuration and display method of the refrigerator inconsistent with the region and not in line with user habits. Utility Model Content

[0003] The purpose of the embodiment of the utility model is to provide a refrigerator that is assembled using universal components to avoid the problem of incorrect components being installed when assembling the refrigerator on the production line. In addition, through automatic recognition technology, the temperature configuration and display requirements of different regions can be identified according to different voltages, and then the corresponding temperature can be configured and displayed, so that the temperature configuration and display method correspond to the region where the refrigerator is located.

[0004] To achieve the above object, the present invention provides a refrigerator, comprising:

[0005] a box body, in which a storage chamber is formed;

[0006] A door, arranged at the opening of the storage chamber, for opening and closing the storage chamber;

[0007] A voltage input module is disposed in the box and connected to an external power supply device;

[0008] A voltage detection module is disposed in the box and connected to the voltage input module;

[0009] A controller, disposed in the box and connected to the voltage detection module;

[0010] A display panel is arranged outside the box door and connected to the controller.

[0011] As an improvement of the above solution, the refrigerator further includes:

[0012] The temperature sensor is arranged in the storage room and is connected to the controller and the display panel respectively.

[0013] As an improvement of the above solution, the voltage detection module includes a first voltage input terminal, a second voltage input terminal, a level signal output terminal, a first voltage dividing module, a second voltage dividing module and a voltage comparison module; wherein,

[0014] The first voltage input terminal is connected to the first voltage dividing module, the first voltage dividing module is also connected to the voltage comparison module, and the output terminal of the voltage comparison module is connected to the level signal output terminal;

[0015] The second voltage input terminal is connected to the second voltage dividing module, and the second voltage dividing module is also connected to the voltage comparing module.

[0016] As an improvement of the above solution, the first voltage input terminal inputs a fixed voltage, and the second voltage input terminal is connected to the voltage input module.

[0017] As an improvement of the above scheme, the voltage comparison module includes a voltage comparator, a first voltage input pin of the voltage comparator is connected to the first voltage divider module, a second voltage input pin of the voltage comparator is connected to the second voltage divider module, a positive pin of the voltage comparator is connected to the first voltage input terminal, a negative pin of the voltage comparator is grounded, and an output pin of the voltage comparator is connected to the level signal output terminal.

[0018] As an improvement of the above scheme, the first voltage divider module includes a first resistor and a second resistor, the first end of the first resistor is connected to the first voltage input end, the second end of the first resistor is respectively connected to the voltage comparison module and the first end of the second resistor, and the second end of the second resistor is grounded.

[0019] As an improvement of the above solution, the first voltage dividing module further includes a third resistor, and the second end of the first resistor is connected to the voltage comparison module through the third resistor.

[0020] As an improvement of the above scheme, the second voltage divider module includes a fourth resistor and a fifth resistor, the first end of the fourth resistor is connected to the second voltage input end, the second end of the fourth resistor is respectively connected to the voltage comparison module and the first end of the fifth resistor, and the second end of the fifth resistor is grounded.

[0021] As an improvement of the above solution, the second voltage divider module further includes a capacitor, a first end of the capacitor is respectively connected to the second end of the fourth resistor and the first end of the fifth resistor, and a second end of the capacitor is grounded.

[0022] Compared with the prior art, the refrigerator disclosed in the utility model detects the input voltage of the refrigerator by setting a voltage detection module, so that the controller can determine the temperature configuration and display mode of the refrigerator according to the level signal output by the voltage detection module. Since the refrigerator is assembled with universal components, the problem of incorrect components being easily installed when assembling the refrigerator on the production line is avoided. The temperature configuration and display requirements of different regions can be identified according to different voltages, and the corresponding temperature can be displayed, so that the temperature configuration and display mode correspond to the region where the refrigerator is located. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the external structure of a refrigerator provided by an embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the internal structure of a refrigerator provided by an embodiment of the utility model;

[0025] Figure 3 It is a structural schematic diagram of a refrigeration system in a refrigerator provided by an embodiment of the utility model;

[0026] Figure 4 It is a structural schematic diagram of a compressor cabin provided by an embodiment of the utility model;

[0027] Figure 5 It is a connection diagram of the controller and the hardware device provided by the embodiment of the utility model;

[0028] Figure 6 It is a working flow chart of the controller provided by the embodiment of the utility model;

[0029] Figure 7 is another connection diagram of the controller and the hardware device provided by the embodiment of the utility model;

[0030] Figure 8 It is a structural block diagram of a voltage detection module provided by an embodiment of the utility model;

[0031] Fig. 9 This is a first circuit diagram of a voltage detection module provided by an embodiment of the utility model;

[0032] Fig.10 This is a second circuit diagram of the voltage detection module provided by the embodiment of the utility model;

[0033] Fig.11 This is a third circuit diagram of the voltage detection module provided by the embodiment of the utility model.

[0034] Among them, 100, refrigerator; 10A, compressor compartment; 1, compressor; 2, evaporator; 3, capillary; 4, condenser; 5, bottom cooling fan; 6, evaporating dish; 10A, compressor compartment. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0037] The terms "first", "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0038] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] See also Figure 1 , Figure 1 It is a schematic diagram of the external structure of a refrigerator 100 provided by an embodiment of the utility model. The refrigerator 100 of this embodiment is approximately rectangular in shape. The refrigerator includes a box body that defines a storage space and a plurality of door bodies arranged at the opening of the box body, wherein the door body includes a door body shell located outside the box body, a door body liner located inside the box body, an upper end cover, a lower end cover, and an insulation layer located between the door body shell, the door body liner, the upper end cover, and the lower end cover; usually, the insulation layer is filled with foam material. The box body is provided with a chamber, wherein the chamber includes a component storage chamber for placing components in the refrigerator, such as a press cabin, etc., and also includes a storage space for storing food, etc.

[0040] See also Figure 2 , Figure 2 This is a schematic diagram of the internal structure of a refrigerator provided by an embodiment of the utility model. The storage space can be divided into multiple storage rooms. The storage rooms can be configured as refrigerators and freezers according to different uses. They can also include variable temperature rooms, vacuum drawers, moisturizing drawers, etc. Each storage room corresponds to one or more door bodies, such as Figure 2 The storage room at the upper part is provided with a double-opening door body. The door body can be pivotally arranged at the opening of the box body, and can also be opened in a drawer-like manner to realize drawer-like storage.

[0041] See also Figure 3 , Figure 3 The schematic diagram of the structure of the refrigeration system in the refrigerator provided by the embodiment of the utility model, the refrigeration system includes a compressor 1, an evaporator 2, a drying filter (not shown in the figure), a capillary tube 3, a condenser 4 and a gas-liquid separator (not shown in the figure). The working process of the refrigeration system includes a compression process, a condensation process, a throttling process and an evaporation process. Among them, the compression process is: plug in the power cord of the refrigerator, when the contacts of the thermostat are connected, the compressor 1 starts to work, the low-temperature and low-pressure refrigerant is sucked into the compressor 1, and is compressed into a high-temperature and high-pressure superheated gas in the cylinder of the compressor 1 and then discharged to the condenser 4; the condensation process is: the high-temperature and high-pressure refrigerant gas dissipates heat through the condenser 4, the temperature continues to drop, and is gradually cooled to a saturated vapor of normal temperature and high pressure, and is further cooled to a saturated liquid, and the temperature no longer drops. The temperature at this time is called the condensation temperature, and the pressure of the refrigerant remains almost unchanged during the entire condensation process; the throttling process is as follows ... The process is as follows: the condensed refrigerant saturated liquid is filtered through a drying filter to remove moisture and impurities and then flows into the capillary 3, through which it is throttled and depressurized, and the refrigerant becomes wet steam at room temperature and low pressure; the evaporation process is as follows: the wet steam at room temperature and low pressure begins to absorb heat and vaporize in the evaporator 2, which not only reduces the temperature of the evaporator 2 and its surroundings, but also turns the refrigerant into a low-temperature, low-pressure gas. The refrigerant coming out of the evaporator 2 passes through the gas-liquid separator and returns to the compressor 1 again, repeating the above process to transfer the heat in the refrigerator to the air outside the box, thereby achieving the purpose of refrigeration.

[0042] See also Figure 4 , Figure 41 is a schematic diagram of the structure of a compressor cabin 10A provided by an embodiment of the utility model, wherein a compressor 1, a condenser 4, a bottom cooling fan 5 and an evaporation dish 6 are arranged in the compressor cabin 10A, and the evaporation dish 6 is used to receive defrost water. Specifically, the evaporation dish 6 is used to receive defrost water in the freezing chamber and / or defrost water when the evaporator 2 is defrosted. The evaporation dish 6 is fixed on the bottom wall of the compressor cabin 10A, and the evaporation dish 6 is a box-shaped structure with an open top. The evaporation dish 6 includes a horizontally arranged bottom plate and side plates protruding upward from the edges of the bottom plate; the side plates are arranged circumferentially and enclosed with each other, and the bottom plate is enclosed on the edges of the side plates to form a box-shaped structure with an open top. The condenser 4 is arranged vertically, and the top end of the condenser 4 is against the top surface of the compressor cabin 10A, so that the compressor cabin 10A has a smaller height on the basis of ensuring that the condenser 4 can be installed in the compressor cabin 10A, thereby ensuring that the storage compartment has a larger volume. The condenser 4 and the compressor 1 are arranged at intervals in the left and right directions. A protruding fixing column is formed on the bottom plate of the evaporating dish 6, and the bottom end of the condenser 4 is fixed to the fixing column directly or through a connecting piece, so that the condenser 4 is fixed in the evaporating dish 6, and the bottom end of the condenser 4 can be higher than the liquid level of the defrosting water in the evaporating dish 6. A bottom cooling fan 5 for heat dissipation is also provided in the refrigerator 100, and a through hole (not marked in the figure) is opened on the side of the compressor cabin 10A facing the bottom cooling fan 5, and an exhaust port is provided on the refrigerator 100 for the outlet of the bottom cooling fan 5. In this embodiment, the bottom cooling fan 5 is a centrifugal fan, and the two sides of the centrifugal fan in the left and right directions are respectively attached to the compressor cabin 10A, and the inlet of the centrifugal fan is penetrated in the through hole of the compressor cabin 10A, so that the air in the compressor cabin 10A passes through the inlet of the centrifugal fan and is discharged from the compressor cabin 10A.

[0043] See also Figure 5 , Figure 5 1 is a connection diagram of a controller and a hardware device provided in an embodiment of the utility model, wherein the refrigerator 100 comprises:

[0044] A voltage input module 10 is disposed in the box and connected to an external power supply device (mains power);

[0045] A voltage detection module 20 is disposed in the box and connected to the voltage input module 10;

[0046] A controller 30 is disposed in the box and connected to the voltage detection module 20. The controller 30 receives the level signal output by the voltage detection module 20 and sends a control signal to the display panel 40 according to the level signal.

[0047] The display panel 40 is arranged outside the box door and connected to the controller 30. The display panel 40 is used to receive a control signal sent by the controller 30 and determine the display mode of the temperature according to the control signal.

[0048] Exemplarily, the controller 30 can be an MCU. The controller 30 has a strong power input and can control various electrical loads, such as a compressor, a fan, a lighting lamp, a heater, a display panel 40, etc. The display panel 40 is a human-machine operation interface and can display the temperature of the storage room, set the adjustable temperature, set the mode, set the standby power on, etc.

[0049] For example, see Figure 6 , Figure 6 This is a flowchart of the controller 30 provided by the embodiment of the utility model. The temperature configuration and display mode used by users in different regions are different. For example, the mains voltage in the first region is 11SV, and the mains voltage in the second region is 220V-230V. The utility model detects the voltage of the mains input. When the main control board detects that the mains input voltage is 11SV, the temperature adjustment range of the display panel is set to 1°C-7°C (example), and it is switched to Fahrenheit display 34°F-44°F; when the main control board detects that the mains voltage is 220V-230V, the temperature adjustment range of the display panel is set to 2°C-8°C (example), and Celsius is displayed. The model configuration is realized by voltage detection, so as to meet the needs of different regions.

[0050] Exemplarily, the voltage input module 10 is connected to the external power supply device, and the external power supply device is AC power, that is, the voltage detection module 20 can output a high-level signal or a low-level signal according to the size of the AC power. When the level signal is a high-level signal, the control signal sent by the controller 30 indicates that the temperature display mode of the display panel 40 is Celsius, and the temperature adjustment range of the refrigerator is set to a first range (such as 2°C to 8°C); when the level signal is a low-level signal, the control signal sent by the controller 30 indicates that the temperature display mode of the display panel 40 is Fahrenheit, and the temperature adjustment range of the refrigerator is set to a second range (such as 34°F to 44°F).

[0051] It is worth noting that a mapping table is pre-stored in the controller 30, and the mapping table records the correspondence between the level signal and the temperature configuration and the temperature display mode. When the controller 30 receives the level signal sent by the voltage detection module 20, it obtains the corresponding temperature display mode and temperature adjustment range by querying the mapping table. An example of the mapping table can be referred to Table 1.

[0052] Table 1 Mapping table example

[0053] Level signal Temperature display mode Temperature adjustment range High level signal Celsius display First Range Low level signal Fahrenheit display Second range

[0054] Specifically, the refrigerator further includes: a temperature sensor 50, which is disposed in the storage chamber and is connected to the controller 30 and the display panel 40 respectively.

[0055] For example, see Figure 7 , Figure 7 : is another connection diagram of the controller 30 and the hardware device provided by the embodiment of the utility model. The temperature sensor 50 is used to detect the real-time temperature data of the storage room. It can be understood that when there are multiple storage rooms, there are also multiple temperature sensors 50, and the storage rooms and the temperature sensors 50 correspond one to one. The controller 30 can control the opening and closing of the temperature sensor 50, and the temperature sensor 50 uploads the detected real-time temperature data to the controller 30, and the temperature sensor 50 can also upload the real-time temperature data to the display panel 40, and the display panel 40 directly displays the real-time temperature data. The specific display method is determined according to the control signal of the controller 30.

[0056] Specifically, see Figure 8 , Figure 8 It is a structural block diagram of a voltage detection module 20 provided in an embodiment of the utility model, wherein the voltage detection module 20 comprises a first voltage input terminal VCC, a second voltage input terminal Vi, a level signal output terminal Vout, a first voltage dividing module 21, a second voltage dividing module 22 and a voltage comparison module 23; wherein the first voltage input terminal VCC is connected to the first voltage dividing module 21, the first voltage dividing module 21 is also connected to the voltage comparison module 23, and the output terminal of the voltage comparison module 23 is connected to the level signal output terminal Vout; the second voltage input terminal Vi is connected to the second voltage dividing module 22, and the second voltage dividing module 22 is also connected to the voltage comparison module 23. The first voltage input terminal VCC inputs a fixed voltage, such as 15V, and the second voltage input terminal Vi is connected to the voltage input module 10 for accessing the mains (such as 115V or 220V~230V).

[0057] Specifically, see Fig. 9 , Fig. 9It is the first circuit diagram of the voltage detection module 20 provided in the embodiment of the utility model. The voltage comparison module 23 includes a voltage comparator IC1A. The pins of the voltage comparator IC1A include 5, namely, a first voltage input pin labeled 3, a second voltage input pin labeled 2, a positive pin labeled 4, a negative pin labeled 8, and an output pin labeled 1. The first voltage input pin of the voltage comparator IC1A is connected to the first voltage divider module 21, the second voltage input pin of the voltage comparator IC1A is connected to the second voltage divider module 22, the positive pin of the voltage comparator IC1A is connected to the first voltage input terminal VCC, the negative pin of the voltage comparator IC1A is grounded GND, and the output pin of the voltage comparator IC1A is connected to the level signal output terminal Vout. It is worth noting that the model of the voltage comparator IC1A is not specifically limited in the embodiment of the utility model, and all voltage comparators in the prior art are applicable.

[0058] Specifically, the first voltage dividing module 21 includes a first resistor R1 and a second resistor R2, the first end of the first resistor R1 is connected to the first voltage input terminal VCC, the second end of the first resistor R1 is respectively connected to the voltage comparison module 23 and the first end of the second resistor R2, and the second end of the second resistor R2 is grounded. The second voltage dividing module 22 includes a fourth resistor R4 and a fifth resistor R5, the first end of the fourth resistor R4 is connected to the second voltage input terminal Vi, the second end of the fourth resistor R4 is respectively connected to the voltage comparison module 23 and the first end of the fifth resistor R5, and the second end of the fifth resistor R5 is grounded.

[0059] Exemplarily, the first resistor R1 and the second resistor R2 play a voltage dividing role. For example, if the first voltage input terminal VCC inputs a 15V voltage, the resistance of the first resistor R1 is 68K, and the resistance of the second resistor R2 is 10K. According to the resistor voltage dividing principle, it can be calculated that the voltage of the circuit where R1 is located is approximately equal to 13.1V, and the voltage of the circuit where R2 is located is approximately equal to 1.9V (i.e. Fig. 9Vr in the figure). Similarly, the fourth resistor R4 and the fifth resistor R5 also play a voltage dividing role. The resistance value of the fourth resistor R4 is 150K, and the resistance value of the fifth resistor R5 is 2.2K. Taking 133V as the boundary, assuming that the mains voltage input by the second voltage input terminal Vi is 133V at this time, according to the resistor voltage division principle, it can be calculated that the voltage of the line where R4 is located is approximately equal to 131.1V, and the voltage of the line where R5 is located is approximately equal to 1.9V (ie, Vc in the figure), and at this time: Vr=Vc. Therefore, when Vi is greater than 133V, it satisfies: Vc>Vr, and Vout outputs a high-level signal; when Vi is less than 133V, it satisfies: Vc≤Vr, and Vout outputs a low-level signal. Since VCC has a fixed input voltage of 15V, taking Vr=1.9V as an example, the voltage comparison in different regions is shown in Table 2.

[0060] Table 2 Example of voltage comparison in different regions

[0061] Vi(V) Vc(V) Compared with Vr (1.9V) Vout Temperature display mode Temperature adjustment range 220 3.2 Vc>Vr High level signal Celsius display First Range 115 1.7 Vc<Vr Low level signal Fahrenheit display Second range

[0062] Specifically, see Fig.10 , Fig.10 This is a second circuit diagram of the voltage detection module 20 provided in an embodiment of the utility model, wherein the first voltage dividing module 21 further includes a third resistor R3, and the second end of the first resistor R1 is connected to the voltage comparison module 23 through the third resistor R3. The third resistor R3 is a current limiting resistor, which plays a current limiting role and is used to protect the voltage comparison module 23 and prevent overcurrent.

[0063] Specifically, see Fig.11 , Fig.11 This is a third circuit diagram of the voltage detection module 20 provided in an embodiment of the utility model, wherein the second voltage dividing module 22 further includes a capacitor C1, wherein the first end of the capacitor C1 is respectively connected to the second end of the fourth resistor R4 and the first end of the fifth resistor R5, and the second end of the capacitor C1 is grounded. The capacitor C1 can reduce resonance and overvoltage, and the loop composed of the grounded capacitor and the grounded resistor can reduce system resonance and overvoltage, thereby improving the safety and stability of the system.

[0064] Compared with the prior art, the refrigerator disclosed in the present invention detects the input voltage of the refrigerator by setting a voltage detection module, so that the controller can determine the temperature configuration and display mode of the refrigerator according to the level signal output by the voltage detection module. Since the refrigerator is assembled with universal components, the problem of incorrect components being easily installed when assembling the refrigerator on the production line is avoided. In addition, through automatic recognition technology, the temperature configuration and display requirements of different regions can be identified according to different voltages, and the corresponding temperature can be displayed, so that the temperature configuration and display mode correspond to the region where the refrigerator is located.

[0065] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the protection scope of the present invention.

Claims

1. A refrigerator, characterized in that: include: a box body, in which a storage chamber is formed; A door, arranged at the opening of the storage chamber, for opening and closing the storage chamber; A voltage input module is disposed in the box and connected to an external power supply device; A voltage detection module is disposed in the box and connected to the voltage input module; A controller, disposed in the box and connected to the voltage detection module; A display panel is arranged outside the box door and connected to the controller.

2. The refrigerator according to claim 1, characterized in that: The refrigerator further comprises: The temperature sensor is arranged in the storage room and is connected to the controller and the display panel respectively.

3. The refrigerator according to claim 1, characterized in that: The voltage detection module includes a first voltage input terminal, a second voltage input terminal, a level signal output terminal, a first voltage dividing module, a second voltage dividing module and a voltage comparison module; wherein, The first voltage input terminal is connected to the first voltage dividing module, the first voltage dividing module is also connected to the voltage comparison module, and the output terminal of the voltage comparison module is connected to the level signal output terminal; The second voltage input terminal is connected to the second voltage dividing module, and the second voltage dividing module is also connected to the voltage comparing module.

4. The refrigerator according to claim 3, characterized in that: The first voltage input terminal inputs a fixed voltage, and the second voltage input terminal is connected to the voltage input module.

5. The refrigerator according to claim 3, characterized in that: The voltage comparison module includes a voltage comparator, a first voltage input pin of the voltage comparator is connected to the first voltage divider module, a second voltage input pin of the voltage comparator is connected to the second voltage divider module, a positive pin of the voltage comparator is connected to the first voltage input terminal, a negative pin of the voltage comparator is grounded, and an output pin of the voltage comparator is connected to the level signal output terminal.

6. The refrigerator according to claim 3, characterized in that: The first voltage divider module includes a first resistor and a second resistor, the first end of the first resistor is connected to the first voltage input end, the second end of the first resistor is respectively connected to the voltage comparison module and the first end of the second resistor, and the second end of the second resistor is grounded.

7. The refrigerator according to claim 6, characterized in that The first voltage dividing module further includes a third resistor, and the second end of the first resistor is connected to the voltage comparing module through the third resistor.

8. The refrigerator according to claim 3, characterized in that: The second voltage dividing module includes a fourth resistor and a fifth resistor, the first end of the fourth resistor is connected to the second voltage input end, the second end of the fourth resistor is respectively connected to the voltage comparison module and the first end of the fifth resistor, and the second end of the fifth resistor is grounded.

9. The refrigerator according to claim 8, characterized in that The second voltage dividing module further includes a capacitor, a first end of the capacitor is respectively connected to the second end of the fourth resistor and the first end of the fifth resistor, and a second end of the capacitor is grounded.

Images